538 DISEASES OF THE HORSE. 
In severe cases there may be a suppurative adenitis, or inflamma- 
tion of the lymphatic glands which are fed from the affected part. 
If the eruption is around the nostrils and lips, the glands between 
the jaws (submaxillary) form abscesses as in a case of strangles; if 
the eruption is in a pair of greasy heels abscesses may form in the 
fold of the groin (inguinal). There may be so much tumefaction of 
the nostrils as to produce difficulty in breathing. 
Complications.—A. case of horsepox may be attended with various 
complications of varying degrees of importance. Adenitis, or sup- 
puration of the glands, has just been mentioned. Confluent erup- 
tions irritate the part and induce the animal to rub the inflamed part 
against the manger or scratch it in other ways and thus produce 
troublesome ulcers, which may leave ugly scars. Irritation of the 
mucous membrame of the nose causes severe coryza with purulent 
discharge. 
The eruption may occur in the throat or in the air tubes to the 
lungs, developing an acute laryngitis or bronchitis. If the animal is 
exposed to cold, or worked so as to engorge the lungs with blood at 
the termination of the specific fever, just when the eruption is about 
to localize, it may be determined to the lungs. In this case we have 
a short, dry cough, labored breathing, the development of a secondary 
fever of some gravity, and all the external symptoms of a pneu- 
monia. This pneumonia differs, however, from an ordinary pneu- 
monia in the symptoms furnished by the examination of the lungs 
themselves. In place of a large mass of the lung tissue being affected 
the inflammation is disseminated in smaller spots over the entire 
lung. 
Diagnosis.—The diagnosis of horsepox is to be based on the pres- 
ence of a continuous fever, with rosy mucous membranes, for several 
days and the appearance of the characteristic eruption. If the 
eruption is in the nasal cavities, marked by a considerable discharge 
and attended with submaxillary abscesses, it may be confounded with 
strangles. If the throat is affected, it may be confounded with an 
angina (laryngitis or pharyngitis), but in the latter the local trouble 
precedes or is concomitant with the fever, while in the former the 
fever precedes the local trouble by several days. Variola may be 
confounded with bronchitis or pneumonia if complicated with these 
troubles and the eruption is absent from the exterior, but it is of little 
moment, as the treatment for both is much the same. When the 
eruption is in the neighborhood of the genital organs the disease has 
been mistaken for dourine. In variola the eruption is a tempo- 
rary one; the nodes and pustules are followed by shallow ulcers 
and rapid cicatrization unless continued in the vagina or on the penis 
by the rubbing of the walls and filth which accumulates; there are 
apt to be pustules at other parts of the body. In the venereal dis- 
